Improvement in adjustable gun-stocks



HOWARD HARTLEY, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT lN ADJUSTABLE GUN-STOCKS.

Specification forming part of Letters Patent No. [90,033, dated April24, 1877; application filed February 1, 1877.

to bring his eye to the line of the barrel in aiming, if long necked,having to bring his head forward, downward, and on an incline sidewise,thus disturbing his natural line of vision and rendering his aimuncertain. This is frequently the case with the guns now in use, thestocks of which are of a nearly standard shape and form. My stock is somade as to readily adjust the line of the barrel to the natural level ofthe eye of any one using the gun, requiring no side or downward movementof the head. The position of aiming is one of perfect ease, and theresults of the firing sure to be more satisfactory.

In Figure 1 of drawings, I show a longitudinal section of a pistol-buttgun-stock, and in Fig. 2 a cross-section of the same, constructed so asto accomplish thee object of my invention.

The stock is formed of two pieces. A is the forward part carrying thebarrel. B is the breech part, to rest upon the shoulder. They are unitedby mechanical parts, which, while they admit of movement, can be firmlyfixed at any point desired.

- Like letters in both views refer to like parts.

G O is a metallic casing, firmly attached to the forward part A by thescrews on a, or equivalents. The rear part of O is in the form of asegment or an arc of a true circle. The sides are curved, also, to truecircles.

(See Fig. 2.) This surface is finished perfect, and on it the slidingpiece 1), fitted to match it perfectly, moves. D is secured to thebreech B by the screws b b b. There is a dovetailed slot, F, in the rearof O, in which is closely fitted the dovetailed slide E. When theconnections are all made this slide is firmly fastened to D by theset-screws d d, and the combination of convave, convex, and flatsurfaces thus produced, while admitting of movement up or down on theline of the slot, will not allow any vibration or twisting.

The slot F is so much longer than the slide E as to admit of aconsiderable movement of B. This is shown by the dotted lines 6 c. Themotive-power for this movement is obtained from the screw 9, or itsequivalent, operating in the nut h, which is secured by a the pivot 41to E. At 1 on the screw g there is a shouldered pivoted joint forconvenience in attaching or detaching parts of the mechanism. At 70there is a collar secured by a pin to compel the screw to perform itswork in one direction, while the outside collar at m compels it to do soin the other. m is made to suit the ordinary form of a gun-socketWrench, which, when applied and turned causes the screw 9 to traversethe nut it, which, communicating motion to the slide E, causes B to riseor fall, as desired, thus enabling the gunner to adjust the gun to suithis eye and shoulder until he is satisfied.

Having thus described my invention I claim- In combination with a pistolgun-stock, the metallic casing O 0, provided with the dovetailed slot E,the covering-piece D, the keyslide E, secured by the screws dd, andpivoted nut h, and screw g, or their equivalents,

substantially as and for the purpose hereinbefore set forth.

HOWARD HARTLEY. Witnesses:

EMIL EYLES, (l. E. MILLIKIEN.

